Method, system and computer readable storage medium for driving liquid crystal displays

Abstract

A method for driving the liquid crystal display comprises dividing a screen of the liquid crystal display into multiple displaying regions, and performing a divisional driving thereto, setting a backlight parameter corresponding to each the displaying region to a first backlight parameter during a first half of a time period of one frame, wherein the first backlight parameter is smaller than or equal to a maximum backlight parameter, setting the backlight parameter to a second backlight parameter during a second half of the time period, wherein the second parameter is smaller than a first threshold value, to have a default frame inserted during the second half of the time period of the one frame, and a difference between a gray level of the default frame and a gray level of a full black frame is within a predetermined range. The technical solution can improve blurred pictures.

What is claimed is: 
     
       1. A method for driving a liquid crystal display, comprising:
 dividing a screen of the liquid crystal display into multiple displaying regions, and performing a divisional driving to the multiple displaying regions; 
 setting a backlight parameter corresponding to each the displaying region of the liquid crystal display to a first backlight parameter during a first half of a time period of one frame displayed by the liquid crystal display, wherein the first backlight parameter is smaller than or equal to a maximum backlight parameter of the each displaying region of the liquid crystal display; and 
 setting the backlight parameter corresponding to each the displaying region of the liquid crystal display to a second backlight parameter during a second half of the time period of the one frame displayed by the liquid crystal display, the second parameter is smaller than a first threshold value, to have a default frame inserted during the second half of the time period of the one frame displayed by the liquid crystal display, and a difference between a gray level of the default frame and a gray level of a full black frame is within a predetermined range. 
 
     
     
       2. The method for driving a liquid crystal display according to  claim 1 , wherein the step of setting the backlight parameter corresponding to each the displaying region of the liquid crystal display to the first backlight parameter, further comprises:
 counting a distribution situation of a gray level of each the displaying region of the liquid crystal display, and determining the backlight parameter corresponding to each the displaying region of the liquid crystal display according to the distribution situation of the gray level of each the displaying region. 
 
     
     
       3. The method for driving a liquid crystal display according to  claim 2 , wherein the backlight parameter corresponding to each the displaying region of the liquid crystal display is determined according to a maximum gray level, a minimum gray level, an average gray level and a most distributed gray level of each the displaying region. 
     
     
       4. The method for driving a liquid crystal display according to  claim 1 , further comprising: performing a brightness compensation to each the gray level of the liquid crystal display, according to the backlight parameter corresponding to each the displaying region of the liquid crystal display and a brightness of each pixel of the liquid crystal display at the backlight parameter. 
     
     
       5. The method for driving a liquid crystal display according to  claim 4 , wherein the step of performing the brightness compensation to each the gray level of the liquid crystal display according to the backlight parameter corresponding to each the displaying region of the liquid crystal display and the brightness of each pixel of the liquid crystal display at the backlight parameter, further comprises:
 calculating B 2  according to an equation of A 1 *B 1 =A 2 *B 2 , wherein the A 1  is the brightness of each the pixel at a full backlight of the liquid crystal display, the B 1  is a normalized brightness of each the pixel at the full backlight of the liquid crystal display, the A 2  is the brightness of each the pixel at the backlight parameter of the liquid crystal display, the B 2  is the normalized brightness of each the pixel at the backlight parameter of the liquid crystal display, wherein the B 1  is obtained according to the distribution situation of the gray level of each the displaying region at the full backlight of the liquid crystal display; and 
 wherein, the method for driving the liquid crystal display further comprises: 
 obtaining the gray level of each the pixel of the liquid crystal display at the backlight parameter according to the B 2 , and driving the liquid crystal display according to the gray level of each the pixel of the liquid crystal display at the backlight parameter. 
 
     
     
       6. A system for driving a liquid crystal display, comprising:
 a dividing module, for dividing a screen of the liquid crystal display into multiple displaying regions, and performing a divisional driving to the multiple displaying regions; 
 a first setting module, for setting a backlight parameter of each displaying region of the liquid crystal display to a first backlight parameter, during a first half of a time period of one frame displayed by the liquid crystal display, wherein the first backlight parameter is smaller than or equal to a maximum backlight parameter of the each displaying region of the liquid crystal display; and 
 a second setting module, for setting the backlight parameter corresponding to each the displaying region of the liquid crystal display to a second backlight parameter, during a second half of the time period of the one frame displayed by the liquid crystal display, wherein the second parameter is smaller than a first threshold value, to have a default frame inserted during the second half of the time period of the one frame displayed by the liquid crystal display, and a difference between a gray level of the default frame and a gray level of a full black frame is within a predetermined range. 
 
     
     
       7. The system for driving a liquid crystal display according to  claim 6 , wherein the first setting module comprises:
 a first counting module, for counting a distribution situation of the gray level of each the displaying region of the liquid crystal display; and 
 a first determining module, for determining the backlight parameter corresponding to each the displaying region according to the distribution situation of the gray level of each the displaying region of the liquid crystal display. 
 
     
     
       8. The system for driving a liquid crystal display according to  claim 7 , wherein the first determining module determines the backlight parameter corresponding to each the displaying region, according to a maximum gray level, a minimum gray level, an average gray level and a most distributed gray level of each the displaying region. 
     
     
       9. The system for driving the liquid crystal display according to  claim 6 , further comprising:
 a compensation module, performing a brightness compensation to each the gray level of the liquid crystal display, according to the backlight parameter corresponding to each the displaying region of the liquid crystal display and a brightness of each pixel of the liquid crystal display at the backlight parameter. 
 
     
     
       10. The system for driving a liquid crystal display according to  claim 9 , wherein the compensation module, for performing the brightness compensation to each the gray level of the liquid crystal display, according to the backlight parameter corresponding to each the displaying region of the liquid crystal display and the brightness of each pixel of the liquid crystal display at the backlight parameter, further comprises:
 calculating B 2  according to an equation of A 1 *B 1 =A 2 *B 2 , wherein, the A 1  is the brightness of each the pixel at a full backlight of the liquid crystal display, the B 1  is a normalized brightness of each the pixel at the full backlight of the liquid crystal display, the A 2  is the brightness of each the pixel at the backlight parameter of the liquid crystal display, the B 2  is the normalized brightness of each the pixel at the backlight parameter of the liquid crystal display, wherein the B 1  is obtained according to the distribution situation of the gray level of each the displaying region at the full backlight of the liquid crystal display; and 
 wherein, the system for driving the liquid crystal display further comprises: 
 obtaining the gray level of each the pixel of the liquid crystal display at the backlight parameter according to the B 2 , and driving the liquid crystal display according to the gray level of each the pixel of the liquid crystal display at the backlight parameter. 
 
     
     
       11. A computer readable non-transitory storage medium with a program for driving the liquid crystal display stored therein, wherein the program is executed to perform the steps comprising:
 dividing a screen of the liquid crystal display into multiple displaying regions, and performing a divisional driving to the multiple displaying regions; 
 setting a backlight parameter corresponding to each the displaying region of the liquid crystal display to a first backlight parameter during a first half of a time period of one frame displayed by the liquid crystal display, wherein the first backlight parameter is smaller than or equal to a maximum backlight parameter of the each displaying region of the liquid crystal display; and 
 setting the backlight parameter corresponding to each the displaying region of the liquid crystal display to a second backlight parameter during a second half of the time period of the one frame displayed by the liquid crystal display, the second parameter is smaller than a first threshold value, to have a default frame inserted during the second half of the time period of the one frame displayed by the liquid crystal display, and a difference between a gray level of the default frame and a gray level of a full black frame is within a predetermined range. 
 
     
     
       12. The computer readable non-transitory storage medium according to  claim 11 , wherein the step of setting the backlight parameter corresponding to each the displaying region of the liquid crystal display to the first backlight parameter, further comprises:
 counting a distribution situation of a gray level of each the displaying region of the liquid crystal display, and determining the backlight parameter corresponding to each the displaying region of the liquid crystal display according to the distribution situation of the gray level of each the displaying region. 
 
     
     
       13. The computer readable non-transitory storage medium according to  claim 12 , wherein the backlight parameter corresponding to each the displaying region of the liquid crystal display is determined according to a maximum gray level, a minimum gray level, an average gray level and a most distributed gray level of each the displaying region. 
     
     
       14. The computer readable non-transitory storage medium according to  claim 11 , wherein the program is executed to perform the steps further comprising: performing a brightness compensation to each the gray level of the liquid crystal display, according to the backlight parameter corresponding to each the displaying region of the liquid crystal display and a brightness of each pixel of the liquid crystal display at the backlight parameter. 
     
     
       15. The computer readable non-transitory storage medium according to  claim 14 , wherein the step of performing the brightness compensation to each the gray level of the liquid crystal display, according to the backlight parameter corresponding to each the displaying region of the liquid crystal display and the brightness of each pixel of the liquid crystal display at the backlight parameter, further comprises:
 calculating B 2  according to an equation of A 1 *B 1 =A 2 *B 2 , wherein, the A 1  is the brightness of each the pixel at a full backlight of the liquid crystal display, the B 1  is a normalized brightness of each the pixel at the full backlight of the liquid crystal display, the A 2  is the brightness of each the pixel at the backlight parameter of the liquid crystal display, the B 2  is the normalized brightness of each the pixel at the backlight parameter of the liquid crystal display, wherein the B 1  is obtained according to the distribution situation of the gray level of each the displaying region at the full backlight of the liquid crystal display; and 
 wherein, the method for driving the liquid crystal display further comprises: 
 obtaining the gray level of each the pixel of the liquid crystal display at the backlight parameter according to the B 2 , and driving the liquid crystal display according to the gray level of each the pixel of the liquid crystal display at the backlight parameter.